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Question

144 red cartons and 90 blue cartons are to be stacked in a canteen. If each stack is of the same height and is to contain cartons of the same colour, then the greatest number of cartons in each stack would be


A
8
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B
5
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C
18
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D
36
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Solution

The correct option is C 18
Here,
the greatest number of cartons in each stack = HCF (144,90)
Applying Euclid's division lemma
144=90×1+54
Here, Remainder 0, so apply again
90=54×1+36
Apply Lemma again, as Remainder 0
54=36×1+18
Apply Lemma again, as Remainder 0
36=18×2+0
Now, remainder is 0
So, required answer is 18
Hence, correct option is c.

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